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Current status of quark gluon plasma signals

  • Compelling evidence for the creation of a new form of matter has been claimed to be found in Pb+Pb collisions at SPS. We discuss the uniqueness of often proposed experimental signatures for quark matter formation in relativistic heavy ion collisions. It is demonstrated that so far none of the proposed signals like J/psi meson production/suppression, strangeness enhancement, dileptons, and directed flow unambigiously show that a phase of deconfined matter has been formed in SPS Pb+Pb collisions. We emphasize the need for systematic future measurements to search for simultaneous irregularities in the excitation functions of several observables in order to come close to pinning the properties of hot, dense QCD matter from data.

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Author:Detlef Zschiesche, Steffen A. Bass, Marcus BleicherORCiDGND, Jörg Brachmann, Lars GerlandGND, Kerstin Paech, Stefan Scherer, Sven Soff, Christian Spieles, Henning Weber, Horst StöckerORCiDGND, Walter GreinerGND
ArXiv Id:http://arxiv.org/abs/nucl-th/0101047
Document Type:Preprint
Year of Completion:2001
Year of first Publication:2001
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Contributing Corporation:Symposium on Fundamental Issues in Elementary Matter, Bad Honnef, Germany September 25–29, 2000
Release Date:2005/04/14
Tag:J/ϕ; QGP signals; dileptons; flow; particle ratios; strangeness
Page Number:12
First Page:1
Last Page:12
Preprint, erschienen in: Heavy ion physics, 14.2001, Nr. 1-4, S. 425–438, doi:10.1556/APH.14.2001.1-4.40
Source:http://de.arxiv.org/abs/nucl-th/0101047 , Proceedings of the Symposium on Fundamental Issues in Elementary Matter In Honor and Memory of Michael Danos 241. WE-Heraeus-Seminar Bad Honnef, Germany, 25--29 September 2000. Acta Phys.Hung.New Ser.Heavy Ion Phy
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Helmholtz International Center for FAIR
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
PACS-Classification:10.00.00 THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS (for experimental methods and instrumentation for elementary-particle physics, see section 29) / 12.00.00 Specific theories and interaction models; particle systematics / 12.38.-t Quantum chromodynamics; Quarks, gluons, and QCD in nuclear reactions, see 24.85.+p / 12.38.Mh Quark-gluon plasma (see also 25.75.Nq Quark deconfinement, quark-gluon plasma production and phase transitions in relativistic heavy ion collisions; see also 21.65.Qr Quark matter)
20.00.00 NUCLEAR PHYSICS / 25.00.00 Nuclear reactions: specific reactions / 25.75.-q Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions)
Licence (German):License LogoDeutsches Urheberrecht